Power Adders Getting a Supercharger or Turbocharger? Thinking about using Nitrous? All forced induction and N2O topics discussed here.

and so it starts

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Old 05-06-2014, 01:57 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Street Lethal
Wanna hear that puppy run, she's gonna sound bad @ss for sure...
soon i hope but ive been so tied up at work working 5am till 6-7pm that i havent had time to finish up the car , it looks like ill be tied up till thursday, i told my boss that im taking off early on friday so i could go get my car finished up

right now im driving a lil toyota tercel with a 1.5L and it sucks cant wait to get the maro back , with gas going up again i cant afford to drive the 3/4 ton silverado anymore it only gets like 6-7 mpg in town on a good day, im actually thinking about swaping the 350 out for a turbo 6.5 diesel that my friend has
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Old 05-07-2014, 05:42 PM
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Re: and so it starts

Could of had the other turbo that I bought just about bolted to the headers by now already (going twins myself), when will you have the engine up and running, tomorrow for sure?
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Old 05-07-2014, 05:55 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Street Lethal
Could of had the other turbo that I bought just about bolted to the headers by now already (going twins myself), when will you have the engine up and running, tomorrow for sure?
not till friday night im tied up at work all week , friday im leaving work around noon to head over and work on the car
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Old 05-11-2014, 08:09 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

i didnt get to finish the car , was about an hour away from being done but we got hit with a pretty bad storm and it knocked the power out.

needless to say theres alot of snow on the ground today

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Old 05-16-2014, 09:23 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

not much to report , the car is just about ready to come off the lift but i only briefly worked on it on wensday .work + the heat has been beating me up so i just havent had the motivation to work on it

hell my lil toyota has had a flat for 3 days instead of changing it ive been driving around the truck
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Old 05-16-2014, 09:26 PM
  #206  
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Engine: Forged 355 with a GT45 turbo
Transmission: TKO 600
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Re: and so it starts

been the same here with mine as well. Still trying to figure out a timing table for mine with the megasquirt. This efi tuning stuff is new to me since ive tuned carbs since i was 15.

cant wait to see yours up and running
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Old 05-16-2014, 09:43 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Badass355ciz28
been the same here with mine as well. Still trying to figure out a timing table for mine with the megasquirt. This efi tuning stuff is new to me since ive tuned carbs since i was 15.

cant wait to see yours up and running
iron or aluminum heads?

18* from 7 psi and up is a good safe starting point a typical sbc will want around 23*-25* total under boost

part of my problem is i get to bed at 1am and im up for work at 5am , then when i get off work i head over to work on the car so im already beat by then
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Old 05-16-2014, 09:48 PM
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Re: and so it starts

aluminum heads on my 355 sbc i have a build thread on Theturboforums.com
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Old 05-16-2014, 09:51 PM
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Re: and so it starts

my problem is it idles excellent...if i ease into the throttle it revs fine but if i stab it it will fall on its face right away.
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Old 05-16-2014, 10:05 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Badass355ciz28
my problem is it idles excellent...if i ease into the throttle it revs fine but if i stab it it will fall on its face right away.

does it recover or just die , if its falling on its face and recovers u need more or less ae enrichment

megasquirt or code 59$?
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Old 05-16-2014, 10:07 PM
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Re: and so it starts

megasquirt as for the 2nd part ill know mor tomorrow after work....been a long day so i dont quite remember
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Old 05-16-2014, 10:09 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Badass355ciz28
megasquirt as for the 2nd part ill know mor tomorrow after work....been a long day so i dont quite remember
if ya want upload ur msq ve and spark tables and ill take a look at them
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Old 05-16-2014, 10:36 PM
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Re: and so it starts

it wont let me post it here...says invalid file do you have an amail i can send them to?
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Old 05-16-2014, 11:26 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Badass355ciz28
it wont let me post it here...says invalid file do you have an amail i can send them to?
u have to put them in a zip file , or just upload them to medifire.com and give me the download link
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Old 05-16-2014, 11:42 PM
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Re: and so it starts

sorry having difficulties here lol medifire brings up some foreign website too
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Old 05-17-2014, 12:11 AM
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Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Badass355ciz28
sorry having difficulties here lol medifire brings up some foreign website too

damn typos , mediafire.com
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Old 05-20-2014, 06:19 PM
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Re: and so it starts

What's the hold up Dave, work...?

Check it out, Murph gets the first win over Paul (Paul spun)...

But then Paul gets his revenge lol...

Both running mid 9's now, single turbo, lost more in it...

http://www.streetfire.net/video/etown-test-51714-1mp4_2458106.htm
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Old 05-20-2014, 07:27 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

no motivation , im working 10-16 hours a day when im done at work i just dont even feel like looking at the car

i have friday night and saturday set aside to work on the car though i dont know how much work will be on the car as i have to replace/paint most of the right side the bike
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luckily none of the fairing is broken its just scratched up pretty bad and i need to replace the blinker , hopefully some sanding and paint is all it will need

rob while i have ur attention whats the going price of an lt t56 out there these days ??? they are way to much money out here

Last edited by project89; 05-20-2014 at 07:30 PM.
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Old 05-20-2014, 07:42 PM
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Re: and so it starts

Over at Red and Black could nab one for peanuts, its the shipping that would be a bitch. They usually go for around 300-400 with high mileage and no rebuild (complete) from private sellers from what I see locally. Nobody really wants them anymore. Frank over at Ask Frank First might have a few lying around as well. Your thinking of going manual...?
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Old 05-20-2014, 07:46 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Street Lethal
Over at Red and Black could nab one for peanuts, its the shipping that would be a bitch. They usually go for around 300-400 with high mileage and no rebuild (complete) from private sellers from what I see locally. Nobody really wants them anymore. Frank over at Ask Frank First might have a few lying around as well. Your thinking of going manual...?
yeah had the thought since day 1 , even if shipping was 1000 bucks it would still be cheaper then buying an lt t56 out here , the prices out here are insane and thats the only thing stopping me from doing the swap

next time ur out at the yard see if u can get a exact price on one for me and see what shipping to 84713 would be

just to give u an idea of cost out here a jy wants 550$ for a th350 i know back there we can pick them up all day long for 50-100 bucks , hell i was paying 100 bucks each for low mileage 700's

if i cant get one im more then likely going t swap in a super t10 or see if i can nab a 4 speed winston cup trans for a decent price
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Old 05-23-2014, 03:38 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

going to out to the farm tonight to work on the bike and the car, i was able to buff most of the scratches out of the fairing so not much to do on the bike except adjust the chain , damn thing is stretched the hell out in only like 900 miles
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Old 05-23-2014, 08:39 PM
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Originally Posted by project89
going to out to the farm tonight to work on the bike and the car, i was able to buff most of the scratches out of the fairing so not much to do on the bike except adjust the chain , damn thing is stretched the hell out in only like 900 miles
Thats why my dad likes the driveshaft bikes. Though he cant ride anymore cause of disability.
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Old 05-25-2014, 11:23 PM
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Re: and so it starts

http://www.mediafire.com/view/yve0pp...urrentTune.msq

Hope this works this is the tune i am working with . My first time using megasquirt so bear with me
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Old 05-26-2014, 01:25 AM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Badass355ciz28
http://www.mediafire.com/view/yve0pp...urrentTune.msq

Hope this works this is the tune i am working with . My first time using megasquirt so bear with me
close enough ill take a look at it sometime tommorow

anyways my car is back on the ground and running. i had some video but after we finished the car we took the dirtbikes out and of course i mounted up my video camera , near the end of the ride we go for a hill climb , buddy makes it no problem on his 450 ,so me and my other buddy look at each other and i gun it , get about halfway up and get into the loose stuff and took a hard hit . they said i was out for about a min .
anyways the hit destroyed my brand new video camera

heres a few pics i took with my cell gota get the pics took with his camera from the top of the mountians and post those up ,

had to give the car and the bikes a bath , its resting place is no longer on the lift yay
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the dark lumps are pieces of gravel i had to dig out of my arm
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lol lot of my right side looks the same
going out on monday to do it again!!!!!!!!!!

Last edited by project89; 05-26-2014 at 01:37 AM.
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Old 05-26-2014, 09:47 PM
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Re: and so it starts

thanks ...and ouch on the digger you took......i didnt mess with my camaro at all today.....rode the 4 wheeler.trx400x..........nice machine.
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Old 05-26-2014, 11:26 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by Badass355ciz28
thanks ...and ouch on the digger you took......i didnt mess with my camaro at all today.....rode the 4 wheeler.trx400x..........nice machine.
i didnt touch my car either lol, i went riding again today

my friend just gave me an 89 suziki 200 something not sure on the model.The bolt for the accelerator pump arm is snapped off so i need to fix that , will be something nice to ride when i want to disapear out into the hills/mountains and or just for riding around town when i get it fixed


i do want his honda xr200r though i love riding that thing its so light u dont have to fight it when riding over real rough stuff , if it had just a little more power i think it would be the perfect dirt bike

edit

its an 86 dr200

i though car parts were exspensive , i just priced up a carb for it and a good used one is 200 bucks , bike might just have to get a micro squirt and a turbo lmfao , only problem would be finding a turbo small enough

Last edited by project89; 05-27-2014 at 02:45 AM.
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Old 05-27-2014, 02:52 AM
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Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

haha i think i found one
http://www.ebay.com/itm/Mini-Turbocharger-VZ21-for-Small-Engines-100-hp-IHI-RHB31-turbo-Motorcycle-UTV-/171240615758?pt=Motors_Car_Truck_Parts_Accessories&hash=item27debc6f4e&vxp=mtr
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Old 05-27-2014, 09:26 AM
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Lol. And here I had an idea awhile back about doing ITBs with a single bike turbo for each cylinder. Till I figured out itd be way too expensive, probably wouldnt work, and wouldnt be streetable at all, lol
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Old 05-27-2014, 02:13 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by willexoIX
Lol. And here I had an idea awhile back about doing ITBs with a single bike turbo for each cylinder. Till I figured out itd be way too expensive, probably wouldnt work, and wouldnt be streetable at all, lol
lol i have no idea what im going to do with it , it has a bent shift fork in the trans right now so it wont go into 1st gear but im not even going to worry about that winter time
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Old 05-31-2014, 07:28 PM
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Re: and so it starts

and i leave yall with a small teaser , the car will be finished and home tongiht

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Old 05-31-2014, 08:20 PM
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Re: and so it starts

Lots to do yet bro, I see a missing wastegate on the drivers side, a TV cable unconnected, a missing cooling system, and a motionless alternator lol. Get that thing done dammit...!!!!
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Old 05-31-2014, 10:17 PM
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Re: and so it starts

is it running on about 4 cylinders? sounds exactly like the ysi car i was working on when it had a few bad injectors....
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Old 05-31-2014, 11:46 PM
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Car: 89 RS 89 iroc 87 firebird
Engine: 3.1 Turbo/ 355 twin turbo
Transmission: a4 w/ 4500 stall/ a4 / t5
Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

Originally Posted by DIGGLER
is it running on about 4 cylinders? sounds exactly like the ysi car i was working on when it had a few bad injectors....

its really rich at the moment i didnt have my laptop with me , i shot another video when i went back after i leaned it out some

the large cam isnt helping any either
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Old 06-01-2014, 12:56 AM
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Re: and so it starts

getting better , but might not be able to run the 120# injectors on gas in this thing , ill see what happens as i get some more tuning done

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Old 06-01-2014, 04:44 PM
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Axle/Gears: strange s60 /w 3:42's
Re: and so it starts

how in the hell are u guys getting small blocks to idle on 120# inectors on gasoline?
looking threw the datalogs im almost at minimum pulse width and im still rich as hell

the only way i see this happening is to make the car idle at 1500 and lower base fuel presure some

im thinking i need to put the 80#er's back in it
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Old 06-01-2014, 04:57 PM
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I dont know much about the sbcs, but I would say put the 80s back in and see where that takes it. If it gets better go 90s, then 100s and find out where your sweet spot will be injector size wise.

Unless someone else chimes in thats all I got, lol. I still got that damn drivers side collector gasket leaking. But all the other leaks are gone including the valve covers and oil return.
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Old 06-01-2014, 05:41 PM
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Re: and so it starts

Originally Posted by project89
how in the hell are u guys getting small blocks to idle on 120# inectors on gasoline?
Umm, who is running 120 pound injectors with a SBC and idling normally with pump gas? E85 sure, but pump gas? You have two options as far as I know, either find a fuel pressure regulator with a higher ratio to compensate for a lowered fuel pressure at idle, or simply swap back to the 80 pound injectors. Even if you get the engine to idle where you want it too with those injectors that low, your going to run into issues, especially if low impedance...
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Old 06-01-2014, 10:41 PM
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Re: and so it starts

buddy of mine runss 120 lb injectors on his procharged gta with a fast xfi. He suggested i run those too but i dont need ones that big.........i went with 70 lb injectors. I also figured out more things with my tuning and was able to get it out on the road today and used the auto tune feature which works pretty nicely. I should be doing some more tuning next weekend. Glad to see you finally got yours to idle.
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Old 06-02-2014, 07:14 AM
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Re: and so it starts

Originally Posted by Street Lethal
Umm, who is running 120 pound injectors with a SBC and idling normally with pump gas? E85 sure, but pump gas? You have two options as far as I know, either find a fuel pressure regulator with a higher ratio to compensate for a lowered fuel pressure at idle, or simply swap back to the 80 pound injectors. Even if you get the engine to idle where you want it too with those injectors that low, your going to run into issues, especially if low impedance...

I have fic 127's on my car but base is turned down to 40 psi so tey are more like 105 lbs. Had them idle fine on my 401 at 1000 rpm and stock 730 ecm now on 411 lsx stuff.

Which 120 lb injectors you using? Assuming a high z style?

105's are good to way over 1000 whp. I am only 74-75 ish % dc i believe. 80's should be plenty for you
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Old 06-02-2014, 07:32 AM
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Re: and so it starts

Originally Posted by Orr89RocZ
I have fic 127's on my car but base is turned down to 40 psi so tey are more like 105 lbs. Had them idle fine on my 401 at 1000 rpm and stock 730 ecm now on 411 lsx stuff.

Which 120 lb injectors you using? Assuming a high z style?

105's are good to way over 1000 whp. I am only 74-75 ish % dc i believe. 80's should be plenty for you

low-z peak and hold lucas's
im going to try to tune the injectors settings a lil bit more and lower base fp to 35#'s , i have a few other lil things i can do with the injector firing scheme to help out as well , ill give the 120's a lil more time before i yank them out and go back to my presicion turbo 80's

80's will do 1000 on gas but not on e85 ,
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Old 06-02-2014, 07:47 AM
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Re: and so it starts

One downside to e85 is the volume of fuel needed. Keep playing with it. I never used peak n hold inj
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Old 06-02-2014, 08:05 AM
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Re: and so it starts

did you buy your injectors new? are you suuuuuure they are all in good shape?
the car i was working on had a set of 85's on it that were new 8 years ago. they sat around all that time, and some of them corroded on the inside. the car ran exactly like your first vid, and was fouling plugs. i sent them off, and after 45 minutes in a heated ultrasonic cleaner 2 were still messed up. so i bought a set of 95's to replace those, and they idle fantastic on a tune my friend did just to hopefully get the car to start up and run. (total guess on the numbers) 388" lt1 with a ysi and 250-260ish duration cam. the injectors are low impedence.
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Old 06-02-2014, 08:19 AM
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Re: and so it starts

Originally Posted by DIGGLER
did you buy your injectors new? are you suuuuuure they are all in good shape?
the car i was working on had a set of 85's on it that were new 8 years ago. they sat around all that time, and some of them corroded on the inside. the car ran exactly like your first vid, and was fouling plugs. i sent them off, and after 45 minutes in a heated ultrasonic cleaner 2 were still messed up. so i bought a set of 95's to replace those, and they idle fantastic on a tune my friend did just to hopefully get the car to start up and run. (total guess on the numbers) 388" lt1 with a ysi and 250-260ish duration cam. the injectors are low impedence.
they are new , the megasquirt is very picky about some of the injector settings when it comes to low-z injectors so i have a bit more playing with it to do

the very first video my air temp sensor wasnt grounded so it was reading negative 60* air temps this caused a boatload of enrichment to the already rich ve table , ad din the cold start enrichments etc

fixing the air temp sensor got it to atleast idle but its idling at 11.3-1 afr pulse widths are down to 1.2-1.4ish ms including opening time so im not sure how much more i can trim them back , i can prolly get them down to .9 , if that dont work i can switch to hires code and get a lil more injector control

my cams inst huge but its fairly big at 232/236 duration on 112lsa with a 1.6 rocker on the intake and 1.5's on the ex
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Old 06-02-2014, 10:44 AM
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Re: and so it starts

Originally Posted by Orr89Rocz
I have fic 127's on my car but base is turned down to 40 psi so tey are more like 105 lbs. Had them idle fine on my 401 at 1000 rpm and stock 730 ecm now on 411 lsx stuff...
True but you are running 400+ cubic inches of displacement, and although the physical size of your block shares the same features as Dave's SBC, your engine flows a great deal more and can essentially use those 127-lb injectors due to your displacement, but even then your relegated to 1000-RPM, not to mention your running high impedance injectors. Big difference. Dave is running a 350 SBC, fifty cubic inches less than you, and is trying to make his engine idle normally with 120-lb low impedance injectors. There is no way that is happening with his setup without a more complex tuning software, and/or an altered fuel pressure ratio. He needs high impedance injectors, and even then expect an everyday 1000+RPM. Dave, your drivetrain setup isn't even ready for 1000-RWHP, let alone 600-RWHP, so to shoot for 1000+ ahead of time defeats the puropose. Throw the smaller injectors back in, get it to idle and eliminate the quirks, then up the ante later on when your confident in the whole package...
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Old 06-02-2014, 10:49 AM
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Re: and so it starts

Originally Posted by project89
my cams inst huge but its fairly big at 232/236 duration...
Your information is all over the place, your signature says 224/224...
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Old 06-02-2014, 11:41 AM
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Re: and so it starts

u know how i am when im undecided on something , i could have sworn i posted saying i i was swaping the cam out , just relized i only posted that i was debating it
dont forget the heads on the engine arent no slouches when it comes to flow

low-z injectors respond much faster then high-z , high-z injectors would make it worse with there longer opening and closing times

the drivetrain is setup minus the rear , i just need to get my butt in gear and get the rear end swapped in

Last edited by project89; 06-02-2014 at 11:46 AM.
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Old 06-02-2014, 11:48 AM
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Re: and so it starts

Originally Posted by Street Lethal
True but you are running 400+ cubic inches of displacement, and although the physical size of your block shares the same features as Dave's SBC, your engine flows a great deal more and can essentially use those 127-lb injectors due to your displacement, but even then your relegated to 1000-RPM, not to mention your running high impedance injectors. Big difference. Dave is running a 350 SBC, fifty cubic inches less than you, and is trying to make his engine idle normally with 120-lb low impedance injectors. There is no way that is happening with his setup without a more complex tuning software, and/or an altered fuel pressure ratio. He needs high impedance injectors, and even then expect an everyday 1000+RPM. Dave, your drivetrain setup isn't even ready for 1000-RWHP, let alone 600-RWHP, so to shoot for 1000+ ahead of time defeats the puropose. Throw the smaller injectors back in, get it to idle and eliminate the quirks, then up the ante later on when your confident in the whole package...
True. I assumed he had high z's but did ask what he was running. I thought the purpose of low z peak and hold was to eliminate the idle problems large high z's had until the latest technology now has huge injectors working well. Guys use the ID1000-1300 cc injectors in 4-6 cyl imports all the time and run great.
My motor shouldnt require tons more fuel at idle than a 350. More fuel as rpm and load changes for sure but i have seen some base bins for 350's run in larger motors. I could idle mine down as lean as i wanted with a high resolution idle table and batt voltage offset adjustments.
I'd say keep playing with it to see if you can find a happy point. But i agree if motor driveline isnt ready for big hp might as well use those 80's and work the base tuning
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Old 06-02-2014, 11:49 AM
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Re: and so it starts

Originally Posted by Street Lethal
True but you are running 400+ cubic inches of displacement, and although the physical size of your block shares the same features as Dave's SBC, your engine flows a great deal more and can essentially use those 127-lb injectors due to your displacement, but even then your relegated to 1000-RPM, not to mention your running high impedance injectors. Big difference. Dave is running a 350 SBC, fifty cubic inches less than you, and is trying to make his engine idle normally with 120-lb low impedance injectors. There is no way that is happening with his setup without a more complex tuning software, and/or an altered fuel pressure ratio. He needs high impedance injectors, and even then expect an everyday 1000+RPM. Dave, your drivetrain setup isn't even ready for 1000-RWHP, let alone 600-RWHP, so to shoot for 1000+ ahead of time defeats the puropose. Throw the smaller injectors back in, get it to idle and eliminate the quirks, then up the ante later on when your confident in the whole package...
dave has low impedance injectors, which are faster acting than orr's high impedance injectors. im pretty sure they should idle ok on a 350 with a smallish cam.
maybe its an issue with the megasquirt, but really i dont even see a need for a complex ecm just to get it to idle....?
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Old 06-02-2014, 12:29 PM
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Re: and so it starts

Originally Posted by Orr89RocZ
True. I assumed he had high z's but did ask what he was running. I thought the purpose of low z peak and hold was to eliminate the idle problems large high z's had until the latest technology now has huge injectors working well. Guys use the ID1000-1300 cc injectors in 4-6 cyl imports all the time and run great.
My motor shouldnt require tons more fuel at idle than a 350. More fuel as rpm and load changes for sure but i have seen some base bins for 350's run in larger motors. I could idle mine down as lean as i wanted with a high resolution idle table and batt voltage offset adjustments.
I'd say keep playing with it to see if you can find a happy point. But i agree if motor driveline isnt ready for big hp might as well use those 80's and work the base tuning
only thing i need to do to driveline is get the dana 60 in the car , im holding off as i want to drive the car around a bit before its down for a few days when i do that

Originally Posted by DIGGLER
dave has low impedance injectors, which are faster acting than orr's high impedance injectors. im pretty sure they should idle ok on a 350 with a smallish cam.
maybe its an issue with the megasquirt, but really i dont even see a need for a complex ecm just to get it to idle....?

yup i need to play with the injector settings some more , when i first got my 80's i had idle problems because they did not use the defualt injector settings that are specified in the megamanual once i got that sorted out they ran perfect. so im sure a lil more tuning and ill get it
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Old 06-02-2014, 01:36 PM
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Re: and so it starts

Originally Posted by DIGGLER
dave has low impedance injectors, which are faster acting than orr's high impedance injectors. im pretty sure they should idle ok on a 350 with a smallish cam. maybe its an issue with the megasquirt, but really i dont even see a need for a complex ecm just to get it to idle....?
Injector pulse spray pattern will be completely irregular, even with the correct driver from the Megasquirt, he is going to have issues. His signature says that this is going to be his, or "the", daily driver, and I don't see that happening without E85, or two sets of injectors for pump gas, or somehow implementing a pressure regulator with varying ratio's. I believe Vortech sells one with varying ratio plates. Right now though, only way that I can see this is to bump up the RPM's, as the engine can only take in so much air at idle, can't force anymore in at idle, and if the injectors are too big for minimum pulse width, then even dancing around the issue by playing with the tune will cause other problems. This takes away the whole concept of daily driver, unless one can live with that as being a daily driver. I am not writing this to deter him, as I would like very much to see him make it work. But I don't think that it will, and I am being honest....
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